The Fractal Engine is the sixteenth building, added in the Feedback Loop update. Its initial price is 310 quadrillion cookies and produces 150 billion CpS by converting cookies into even more cookies.


Fractal Engine achievements
Icon Name Description ID
Plain fractal engine Self-contained Have 1 fractal engine. 413
Berrylium fractal engine Threw you for a loop Have 50 fractal engines. 414
Blueberrylium fractal engine The sum of its parts Have 100 fractal engines. 415
Chalcedhoney fractal engine Bears repeating Have 150 fractal engines. 416
Buttergold fractal engine More of the same Have 200 fractal engines. 417
Sugarmuck fractal engine Last recurse Have 250 fractal engines. 418
Jetmint fractal engine Out of one, many Have 300 fractal engines. 419
Cherrysilver fractal engine An example of recursion Have 350 fractal engines. 420
Hazelrald fractal engine For more information on this achievement, please refer to its title Have 400 fractal engines. 421
Mooncandy fractal engine I'm so meta, even this achievement Have 450 fractal engines. 422
Astrofudge fractal engine Never get bored Have 500 fractal engines. 423
Alabascream fractal engine Tautological Have 550 fractal engines. 489
The needs of the many The needs of the many Make 1 octillion cookies just from fractal engines. 424
Eating its own Eating its own Make 10 decillion cookies just from fractal engines. 425
We must go deeper We must go deeper Make 100 duodecillion cookies just from fractal engines. 426
Sierpinski rhomboids Sierpinski rhomboids Reach level 10 fractal engines. 427


Fractal Engine upgrades
Icon Name Unlock condition Base price Description ID
Plain fractal engine Metabakeries Own 1 fractal engine Money 3.1 quintillion Fractal engines are twice as efficient.
"They practically bake themselves!"
Berrylium fractal engine Mandelbrown sugar Own 5 fractal engines Money 15.5 quintillion Fractal engines are twice as efficient.
"A substance that displays useful properties such as fractal sweetness and instant contact lethality."
Blueberrylium fractal engine Fractoids Own 25 fractal engines Money 155 quintillion Fractal engines are twice as efficient.
"Here's a frun fract : all in all, these were a terrible idea."
Chalcedhoney fractal engine Nested universe theory Own 50 fractal engines Money 15.5 sextillion Fractal engines are twice as efficient.
"Asserts that each subatomic particle is host to a whole new universe, and therefore, another limitless quantity of cookies.
This somehow stacks with the theory of nanocosmics, because physics."
Buttergold fractal engine Menger sponge cake Own 100 fractal engines Money 1.55 septillion Fractal engines are twice as efficient.
"Frighteningly absorbent thanks to its virtually infinite surface area. Keep it isolated in a dry chamber, never handle it with an open wound, and do not ever let it touch a body of water."
Sugarmuck fractal engine One particularly good-humored cow Own 150 fractal engines Money 155 septillion Fractal engines are twice as efficient.
"This unassuming bovine was excruciatingly expensive and it may seem at first like you were ripped off. On closer inspection however, you notice that its earrings (it's wearing earrings) are actually fully functional copies of itself, each of which also wearing their own cow earrings, and so on, infinitely. It appears your dairy concerns will be taken care of for a while, although you'll have to put up with the cow's annoying snickering."
Jetmint fractal engine Chocolate ouroboros Own 200 fractal engines Money 155 octillion Fractal engines are twice as efficient.
"Forever eating its own tail and digesting itself, in a metabolically dubious tale of delicious tragedy."
Cherrysilver fractal engine Nested Own 250 fractal engines Money 155 nonillion Fractal engines are twice as efficient.
"Clever self-reference or shameful cross-promotion? This upgrade apparently has the gall to advertise a link to, in a tooltip you can't even click."
Hazelrald fractal engine Space-filling fibers Own 300 fractal engines Money 155 decillion Fractal engines are twice as efficient.
"This special ingredient has the incredible ability to fill the local space perfectly, effectively eradicating hunger in those who consume it!
Knowing that no hunger means no need for cookies, your marketers urge you to repurpose this product into next-level packing peanuts."
Mooncandy fractal engine Endless book of prose Own 350 fractal engines Money 155 undecillion Fractal engines are twice as efficient.
" "There once was a baker named [bakeryName]. One day, there was a knock at the door; [bakeryName] opened it and was suddenly face-to-face with a strange and menacing old grandma. The grandma opened her mouth and, in a strange little voice, started reciting this strange little tale :" [note 1]
Astrofudge fractal engine The set of all sets Own 400 fractal engines Money 1.55 tredecillion Fractal engines are twice as efficient.
"The answer, of course, is a definite maybe."
Alabascream fractal engine This upgrade Own 450 fractal engines Money 15 quattuordecillion Fractal engines are twice as efficient.
"This upgrade's flavor text likes to refer to itself, as well as to the fact that it likes to refer to itself. You should really buy this upgrade before it starts doing anything more obnoxious."

Other UpgradesEdit

Icon Name Unlock condition Base price Description ID
GrandmaAchieveNew Metagrandmas 15 fractal engines and 1 grandma owned Money 15.5 quintillion Grandmas are twice as efficient. Fractal engines gain +1% CpS per 14 grandmas.
"A fractal grandma to make more grandmas to make more cookies."
Synergy I fractal engine Recursive mirrors 15 Prisms, 15 Fractal engines and "Synergies Vol. I" purchased Money 66.2 sextillion Prisms gain +5% CpS per fractal engine.
Fractal engines gain +0.1% CpS per prism.
"Do you have any idea what happens when you point two of these at each other? Apparently, the universe doesn't either."
Synergy II fractal engine Mice clicking mice 75 Cursors, 75 Fractal engines and "Synergies Vol. II" purchased Money 62 octillion Cursors gain +5% CpS per fractal engine.
Fractal engines gain +0.1% CpS per cursor.
"Absolutely blasphemous(e)!"
Fortune fractal engine Fortune #016 Random fortune from news ticker Money 24.111 quattuordecillion Fractal engines are 7% more efficient and 7% cheaper.
"It's good to see yourself in others. Remember to see yourself in yourself, too."


  • To get 200 Fractal Engines, you need 2.849958299688827e+30 cookies, or 9.1934139e+12 times the original price.
  • The title of the achievement for 450 fractal engines is reference to xkcd comic no. 917.
  • "Mice clicking mice" is a reference to "Mouse Chasing Mouse", a song by Swedish alternative rock band Undergaurd.


  1. Shown as infinitely scrolling text displaying 35 characters at a time that wraps around to the beginning once it reaches the end (" strange little tale : "There once "). [bakeryName] is the name of your bakery.
Cursor 64px
Mine new
Factory new
Wizard Tower
Shipment new
Alchemy Lab
Portal new
Javascript console
Javascript Console
Timemachine new
Time Machine
Antimatter Condenser
Fractal engine
Fractal Engine
Buildings overviewCategory:Buildings
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